Shuttle threading and tensioning device



Aug'- 21' 1945 J.. COLDW'ELL 2,383,239

SHUTTLEv THREADING AND TENsIoNING DEVICE Filed-July. 2:43, 1943PatentedAug. 21, Y1945 SHUTTLE THREADING AND TENSIONING DEVI JosephColdwell, Fall River, Mass., assgnor to John S. Coldwell, Fall River,Mass.

Application July 24, 1943, Serial No. 496,256

s claims.` (c1. 13s- 215) The present invention relates to textile loommechanisms and is particularly `directed to a threading and tensioningdevice for shuttles.

Tensioning devices for shuttles in automatic looms heretofore have hadno means for regulating or adjusting the tension on the thread to a finedegree as it passes through the shuttle; moref over the heretofore useddevices for shuttles on automatic looms havenot provided proper tensionfor different kinds and types of thread, so that all kinds of clothcouldnotbe woven. I-Ieretofore the tensioning andthreading devices Vhaveprovided tension on the thread by passing the thread through labyrinthsor around a seriesof pins so as to 'create a.tortuous path for thethread. Such tensioning devices are normally threaded by hand with theaid of a hook or wire and are therefore notsuitedto automatic looms,

as the ends of the thread must be manually threaded.

The principal object of the present invention is to provide a tensioningand threading device for shuttles for automaticlooms whereby the lo ablyregulate the tension and which automatithread from the bobbinautomatically threads itself in theshuttle and tensioning device.

A further object of the invention is to provide 4means for regulatingthe tension upon the thread as it passes through the shuttle.

Anotherl object is` to provide a tensioning device 30 which'can bequickly threaded wthoutthe aid of hooks orwires.

Still another object of my invention `is to `provide an automatictensioning device which is simply constructed and which can beinexpensively manufactured and assembled.

Still another object of my invention is to provide a tensioning devicefor shuttles `which is adapted to handle.` all standard types and sizesof threads.

With the above and other objects andfadvantageous features in viewtheinvention 'consists of a novel arrangement of parts more fully disclosedin the detailed description following, in conjunction with theaccompanying drawing, and more specifically defined inthe claimsappended thereto. I

Beferringto the drawing:

Fig. lis a plan view of the tensioning device installed in the head of ashuttle;

Fig. 2 is a sectional view on line 2 of Fig. 1 with `the pallet in itslowest position;

` Fig. 3 is a sectional view on line 3 of Fig. 1 showing the pallet inits uppermost position;

Fig.,4 is a plan view'with pallet in raised position and showing thethread positioned within the guide openings;

Fig. 5 is a plan view with pallet in lowest position and showing thethread properly threaded in the eyes;

and

Fig.` '1 is a perspective View of the pallet mounted'on the swivel pin.

AIthas been found desirableto provide a tensioning and threading devicewhich eliminates the useof waste, cloth, fur, leather, or similarmaterial positioned to create a drag or friction upon the thread andftoprovide means to adjustcally threads itself and the shuttle.`

Referring to the drawing reference numeral IIJ indicates a shuttleprovided with a bobbin Il for supplying the pick or filling thread I2,the thread leaving the shuttle and sliding in the bottom of the groove`I3 and out of the eye I4 formed by pins I5 and I6 interposedtherebetween. Along `the course of the thread is positioned :atensioning device generally designated as I1, located in the recess I 8of the shuttle IIJ and retained firmly in position by machine ,screws I9and219engaged into threaded holes 2| inthe base 22. Extending verticallyfrom said base at right angles thereto is a ange 23 having two uppersurfaces`24 and 25 disposed so as toform a V shaped opening 26 which ismade continuous with a retaining eye 21 by means of a communicating slot28. A second flange 29 is similar to and spaced from the iiange 23except that it is of greater thickness, with its upper surfaces 30 and3| similarly disposed to form a V shaped opening 32which is madecontinuous with a retaining eye 33 by means of a slot 34. llnterp'osed`between the space anges 23 and 29 is a boss 35 having `upper surfaces 36and 31 forming an opening 38 which is made continuous 4with a retainingeye 39 by means of a slot 4D.` Theeyes 21, 33 and 39 are in axialalignment and at right angles to the flanges 23 and 29, and the slots28, 34 and 40 are also in the same plane. `A hinge pin 4I is positionedin an opening 42 of flange 23 and is secured in flange 29 by beingthreaded at 43, the pin being parallel to the alignment of eyes 21, 33and 39. A pallet generally designated as 44 is provided, havingbearings-'45 and 46 by which it is swivelly mounted on Vthe pin 4l.Extending at right angles from =bearings45 and 46 are curved arms 41 and48, which terminate in the loops 49 and 50,. the latter being open asindicated at 5I and 52. The axial centers of the loops 49 and 50describe arcs which `pass through the'axial center lines of the eyes 21,33 and39, the downward motion of the pallet 44 being limited by theloops 49 and 50 making contact with the'base 22, and the upward motionbeing limited by a stop 53 which makes Contact with the base at 54. Anadjusting pin 55 is snugly tted into the shaftways 51 and' 58 of theshuttle lll, and is provided with a hole 59 through which an elasticcord 6I) passes, the elastic cord Fig.v 6 is a perspective view of thebase portion; i

being retained by a knot 6|. The other end of said elastic cord passesthrough the hole 62 provided in arm 41 and is retained in position by aknot 63, an opening 64 in the shuttle Il) providing clearance for theelastic cord. The tension of the elastic c ord is adjusted and regulatedby turning the pin 55 to thus Wind or unwind the cord.

' The operation of the novel -tensining `,and threading device may nowbe explained. First I will explain the operation when the tensipningdevice is used on shuttles where the hbbins are manually replaced. Afterthe bobbin has been placed in the shuttleit is only aeeessary for `theoperator to position the thread I2 of the ybobbinr in the groove |3a ofthe shuttle and-pull the thread beekwefd towere the hebbe@ This actioncauses thethread `to be pulled into the grqoye .Iqand with ,eye I4Aformed by the Vpins l,5.and I6, and simultaneously the `friction of thethread leaving .the bobbin causes the thread to become taut, andf lay inthe shaped openings 26 and 3 2 and the opening `5I and 52 of the loops4,9 and 50. This ,action also ,causes the pallet to be depressed to itslowest position and the thread is vguided by the V shaped openings 25and 432 into the slots 211%, 34.a nd ,41). "-Ihe thread as it is pulledfron; .the bobbin has a slipping action as it .unwinds from the bobbinspindle which causes it to be securely seated in the .eyes rV21, 33 and39. It can now be readily seen Jthat the .pallet exerts an .upwardtension upon ythe thread. I2 and that this .tension is minutely andexactly regulated by roftating pin 5 5 which causes elastic cord 5.0 tobe shortened or lengthened as desired. Although I have/ described the,operation as being done manu.- ally, the operation .of pulling thethread l,2`into the slot I3a and I3 and thence vinto ,eye I4 isautomatically done. on automatic looms by the normal aotonof the Shuttlein o onilmeton with the usual means provided ,on automatic looms.

,vWhile I' have illustrated and ,described a preferred embodiment oi myinvention, I Wish te haya it understood that I do not .limit myself tothe species construction and arrangement or parte herein Shown enddescribed' bei wield .to

oever all Similar or eoeivelerit eolieireeiieee following claims.

Weet I Gleim. Les .new end desire to s .eodre by Letters Patent pf theUnited States is: 1. In a threading and tensioningdevice for a shuttle,a base having spaced standards, said standards having aligned 'threadretaining eyes, slots communicating with said eyes, guideopenings forsaid slots, whereby a thread may be drawn through said guide openingsand said thread retaining eyes, and a thread tensioning device mountedon said base between said spaced standards Yfor engaging the threadpassing throughthe aligned threadretaining eyes,

2. In a threading and tensioning device Afor a shuttle, a basehaving'spaced standards;` said standards having aligned 'threadretaining eyes, slots communicating .with said eyes, guide openings forsaid slots`,`whereby a thread may be drawn through said guide openingsand said shuttle, a base having spaced standards, said standards havingaligned thread retaining eyes, Slots eemmeoieens with Seid eyes guideeeen- -ings for said slots, whereby a"thread may be drawn through saidguide openings and said thread retaining eyes, and a thread tensioningdevice pivotally mounted in said base between Spedndids and having loopsadapted to redeive the thread passing through the aligned within theterme ,or Spirit. o f appended thread retaining eyes, and a threadtensioning dethread retaining eyese fl. Ina Lthreading and tensioningdevice for a "shuttle, abase havingV spaced standards, said standardshaving ,aligned thread retaining eyes,

slots cerninunicating with said eyes, guide openings -for said slots,whereby a thread maybe drawn 'ihr-.elige .eaideuide openings and Seidthread ,retaining exea and e thread tensioning device .pivotally'mpunted in said base between spaced .standards ,and having y.lor/)ps4adapted to receiye the ,thread passing through the aligned threadretaining .eyes,.said thread tensioning `de vie `having a limitstep topreyent excessive rise with respect ,to saidretaining eyes.

,5. Ina threading and tensioning device for4 a shuttle, a .base having.spaced standards, said standards having aligned thread retaining eyes,.Slots eommeoieetiee with ,Seid eyes. guide openings* for vsaid slots,whereby athread may be drawn tlnough said .guide openings and saidthread retaining eyes, ,and a thread tensioning deyice lmounted on saidbase between said spaced Standards for engaging the thread passingthrough `the alignedl thread retaining eyes, said thread .tensioningdevice'having a limit stop vto prevent excessiverise with respect tosaid retaineing eyes.

.6. In a threading and tensioning device for a shuttle, a base havingspaced standards, said standards having `aligned thread retaining eyes,slots of narrow width communicating with said eyes, guide openings forsaid slots, whereby a `thread may bedrawn through said guide open.- ingsand said thread `retaining eyes, and a thread teaieliing ,device mountedon said base between ,Said Vseeded standards for engaging the threadpassing through the aligned thread retaining eyes, said threadtensioning device being resiliently greed upwardly to tension thethread.

7, vIn a threadingand tensioning device for a shuttle, a base having`spaced standards, said standards having aligned thread retaining eyes,.Slots of narrow 'Width eommuoieeioe with Seid eyes, guide openings .forsaid Slots, whereby a thread may be drawn through said guide ,openf ieee.and Seid thread retaining eyes, and d thread tensioning device. mountedon said base between said spaced standards for engaging the threadpassing through the aligned thread retaining eyes, said threadtensioning vdevice being resiliently urged upwardly to tension thethread and mea-ns for1 controlling the tension. i

8. In a thread receiving element'for a shuttle, comprising a baise,spacedvertical standards on said base,'said standards having alignedthread reaining eyes, inclined slots communicating with vsaid eyes atone side thereof, and angularly disposed guide surfaces forming awideinlet for receiving' a thread and converging for guiding the thread intothe slots.

JOSEPH COLDWELL.

